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(IAAC) Vy 1-2 (PK 53+24 1; PN G053.3+24.0)
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 21 August 1998, about 22h10 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.31
Seeing (1 to 5 - best to worst): 2 (stellar stars until 211x)
Moon up (phase?): no
Instrument: Coulter Newtonian 17.5" F/4.5
Magnification: x211
=46ilters used: UHC, OIII, Hbeta, Rainbow Spectroscope
Object: Vy 1-2 (PK 53+24 1; PN G053.3+24.0)
Category: Planetary Nebula
Constellation: HER
Object data: Vmag=3D12.0; dim.5"; type II; central * ??; discovered by
Vyssotsky in 1942; ELCAT: [OIII 4959+5007]=3D16x[Hbeta]
RA/DE: 17h54.4m, +28=B000' (2000); Uranometria 116
Description: at 211x and OIII, very small PN, round with nebulous edges;
faint and nebulous when powers are 211x and up (under it lokks stellar);
brighter center; no central star, no colour; UHC as a good contrast gain
and OIII has a very good one; Hbeta shows no gain; the spectrum shows a
bright elongated patch at the OIII lines area and a very faint patch at
Hbeta.
I can provide a scanned drawing of Vy 1-2 to anyone who can read the binhex
encoding of Eudora (for Mac); just mail me to try
(ypothier@abi.snv.jussieu.fr), it works sometimes with other
configurations...
Yann Pothier tel: 01 43 41 43 29
11 impasse Canart, 75012 PARIS, FRANCE
Email: ypothier@abi.snv.jussieu.fr
Site : http://pegase.unice.fr/~skylink/publi/cielextreme
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